Keithley 2520, Service Manual, Page: 122 / 137

B-2 Calibration Reference Model 2520 Pulsed Laser Diode Test System Service Manual
Introduction
This appendix contains detailed information on the various Model 2520 remote calibration
commands, calibration error messages, and methods to detect the end of each calibration
step.
Section 2 of this manual covers detailed calibration procedures.
Command summary
Table B-1 summarizes Model 2520 calibration commands. These commands are covered
in detail in the following paragraphs.
Table B-1
Calibration commands
Command Description
:CALibration
:PROTected
:CODE '<password>'
:CODE?
:SENSe[1] <NRf>
:DATA?
:SENSe2 <NRf>
:DATA?
:SENSe3 <NRf>
:DATA?
:SOURce[1] <NRf>
:DATA?
:PROTection
:DATA?
:LOW
:DATA?
:SOURce2 <NRf>
:DATA?
:SOURce3 <NRf>
:DATA?
:DATE <yyyy>,<mm>,<dd>
:DATE?
:NDUE <yyyy>,<mm>,<dd>
:NDUE?
:SAVE
:LOCK
:LOCK?
:COUNt?
Calibration subsystem.
Calibration commands protected by password.
Unlock calibration. (Default password: KI002520.)
Query calibration code/password.
Calibrate active voltage measurement range.
Query voltage measurement calibration constants.
Calibrate active detector 1 current measurement range.
Query detector 1 current measurement calibration constants.
Calibrate active detector 2 current measurement range.
Query detector 2 current measurement calibration constants.
Calibrate active current source range.
Query current source calibration constants.
Calibrate voltage compliance DAC.
Query voltage compliance DAC calibration constants.
Calibrate low current output level DAC.
Query low current output level DAC calibration constants.
Calibrate detector 1 voltage bias source.
Query detector 1 voltage bias source calibration constants.
Calibrate detector 2 voltage bias source.
Query detector 2 voltage bias source calibration constants.
Program calibration year, month, day.
Query calibration date.
Program calibration due year, month, day.
Query calibration due date.
Save calibration data in EEPROM.
Lock out calibration.
Query if calibration is locked. (1 = locked; 0 = unlocked).
Query number of times Model 2520 has been calibrated.